Attach the owner of the cat before answering ~ ~? I just bought a box recently. Our cat owner has been using this litter for many years. Generally, a box of cat litter can last about 2 months. If you're hoarding this for the New Year, that's enough. There is nothing to say about the antibacterial effect and caking of this cat litter. It's much more comfortable to clean up after using this cat litter, but this cat litter is now renamed platinum diamond cat litter instead of blue diamond cat litter. It seems that it was renamed in August last year ~ ~ Have you searched? Clean or platinum diamond cat litter will do.